Matthew however says that the disciples came to Jesus, saying, “Who is the greatest in the kingdom of heaven?” [Matt 18:1]
The reason is, that He did not begin the narrative from its commencement, but omitted our Saviour’s knowledge of the thoughts and words of His disciples; unless we understand Him to mean, that even what they thought and said, when away from Christ, was said unto Him, since it was as well known to Him as if it had been said to Him.
It goes on: “For by the way they had disputed among themselves, who should be the greatest.”
But Luke says [ed. note: Luke 9:46, Vulgate] that “the thought entered into the disciples which of them should be the greatest;” for the Lord laid open their thought and intention from their private discourse according to the Gospel narrative.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Vict. Ant. e Cat. in Marc.